Outerelo, Enrique <br/><br/>
Mapping degree theory 
by Enrique Outerelo and Jesus M Ruiz 
 - Rhode Island  AMS  2009 
 - x, 244p. 
<br/><br/><label>ISBN: </label>9780821887141 
<br/><br/><label>Dewey Class. No.: </label>515.7248  / P09